Downloading a proprietary language pack from unofficial sources treads into a legal gray area, and it is important to understand the risks.
you can't legally download these. If you do not have the English pak on the CD it will infringe on EA's copyright agreement. Stack Exchange How to change your Language in Crysis 2 - Game Skyrim Forum Crysis 1 English Language Pack Download
Given that direct, legal downloads of the language pack are scarce, users have turned to a few different methods. Remember to always back up your original game files before attempting any manual installation. Crysis 1 English Language Pack Download
I can provide the exact directory paths or troubleshooting steps for your specific version. Share public link Crysis 1 English Language Pack Download